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The Ensign Toolbox

Free, privacy-first PDF tools and engineering calculators. Every file is processed in your browser — nothing is uploaded.

Most popular

Merge PDF
Split PDF
Compress PDF
Word to PDF
PDF to Word
JPG to PDF
PDF to JPG
Rotate PDF

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The Ensign Toolbox

Free, privacy-first PDF tools and engineering calculators. Every file is processed in your browser — nothing is uploaded.

Ensign Tools

Ensign Compare
Ensign Stitch
Ensign Design
Ensign Select
Ensign Clean
Ensign Pack

Organise

Merge PDF
Split PDF
Organize PDF
Rotate PDF
Delete Pages
Extract Pages

Edit

Edit PDF
Sign PDF
Fill & Sign
Add Watermark
Add Page Numbers
Background Colour

Convert to PDF

Word to PDF
Excel to PDF
PowerPoint to PDF
JPG to PDF
PNG to PDF
CBZ to PDF

Convert from PDF

PDF to Word
PDF to Excel
PDF to JPG
PDF to PNG
PDF to WebP
PDF to BMP

Secure & Optimise

Compress PDF
Redact PDF
Encrypt PDF
Decrypt PDF
OCR PDF
PDF to PDF/A

Mechanical

Heat Loss
Pipe Weight
Pump Duty
Heating Output & Flow
Expansion Vessel Sizing
Pipe Sizing

Electrical

Voltage Drop
Fault Current
Maximum Demand
Cable Sizing
Containment Fill
Earth Fault Loop Impedance (Zs)

Ductwork

Duct Heat Gain/Loss
Ductwork Weight & Loading
Duct Leakage
Duct Pressure Drop
Ductulator
Specific Fan Power (SFP)

Insulation

Dew Point Check
Pipe Heat Loss
U-Value / R-Value Builder
Interstitial Condensation Risk
Surface / Touch Temperature
Economic Insulation Thickness

Sustainability

Operational Carbon & Running Cost
Embodied Carbon Estimator
Carbon Payback
Solar PV Generation & Savings
Whole-Life Carbon (A1-C4)
BREEAM Credit Estimator

Contractor Tools

Delay & Disruption
Resource Loading
Subcontractor Scorecard
Procurement Lead-Time
Markup / Margin / Sell Price
All-In Labour Rate Build-Up

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